Between animal and human medicine, there is no dividing line-nor should there be.

The task of science, therefore, is not to attack the objects of faith, but to establish the limits beyond which knowledge cannot go and found a unified self-consciousness within these limits.

Medical statistics will be our standard of measurement: we will weigh life for life and see where the dead lie thicker, among the workers or among the privileged.

It is the curse of humanity that it learns to tolerate even the most horrible situations by habituation.

Cellular pathology is not an end if one cannot see any alteration in the cell. Chemistry brings the clarification of living processes nearer than does anatomy. Each anatomical change must have been preceded by a chemical one.

Marriages are not normally made to avoid having children.

The task of science is to stake out the limits of the knowable, and to center consciousness within them.